Knowledge of the effect of detonation conditions on the decontamination effectiveness should aid in interpreting data cbtained in the field, in correlating data from different tests, in correlating laboratory and field data, and in extrapolating data from one detonation condition to another . .1.2 OBJECTIVES The specific objectives of this report are (1) to discuss :the major parameters that can influence the radiochemical and chemical composition of fallout, (2) to develop empirical ratio scaling relationships, évaluate the scaling equation constants from available data, and illustrate the use of the scaling functions in estimating realistic fallout compositions for past decontamination experiments, and (3) to present information that will be useful in preparing syn- thetic fallout. 1.3 SCOPE This report discusses the effect of detonation con@itions on the contour ratio scaling functions and how the detonation conditions can influence the composition of fallout from land, harbor, ani sea bursts. The data used in evaluating the empirical scaling constants were obtained from previously reported ani evalusted field test data; in most eases this included data from field operations up to and including Operation PLUMBBOB. por/NY